When I was a teenager quite a number of cases of Reid camers and lenses were discovered unfinished (all the parts were there) and these were finished and sold off by a company specialising in Government /Military surplus photographic materials (camera/films/papers etc) A.W. Young. I was a University student at the time and although they were cheap it was still more than I could afford.
David makes a point mentioning AGI.I think they only stopped making cameras quite recently.
During the 1st WW Britain (and the Empire/Commonwealth) had problems with Optical glass needed for military instruments and lenses because it had nearly all come from Germany. As a consequence the Government worked with Pilkingtons to produce optical glass, almost all the specialist glass used in Japan to blend optical glass comes from Pilkington's., the Japanese bought the company recently.
During WWII there was a shortage of precision cameras in the UK because a very high percentage had previously been impoted from Germany, many Leica's, Contax's. Rollei's etc were requisitioned for military use. The Focal Press camera guides were initially written as manuals for these cameras for wartime use.
After WWII the UK Government was concerned that the UK camera industty had been weak and unable to supply nwhat was really needed so they encouraged a number of companies to work with them using the War Reparations agreements to access German technology.
So we had Reid and Sigrist an off-shoot of Taylor Taylor Hobson (Cooke) making cameras based on Leicas, MPP making the Micro Technical based on the Linhof andalso the Microcord & Microflex based on Rolleis and AGI making the Agigflex based onthe Reflex Korelle.
All very well engineered and with excellent lenses.